US11436180B2 - I3C slave interface, integrated circuit including an I3C slave interface, and method for operating an I3C slave interface - Google Patents
I3C slave interface, integrated circuit including an I3C slave interface, and method for operating an I3C slave interface Download PDFInfo
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- US11436180B2 US11436180B2 US17/043,049 US201917043049A US11436180B2 US 11436180 B2 US11436180 B2 US 11436180B2 US 201917043049 A US201917043049 A US 201917043049A US 11436180 B2 US11436180 B2 US 11436180B2
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- Prior art keywords
- bus
- signaling
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- adaptation device
- adaptation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40032—Details regarding a bus interface enhancer
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/36—Handling requests for interconnection or transfer for access to common bus or bus system
- G06F13/368—Handling requests for interconnection or transfer for access to common bus or bus system with decentralised access control
- G06F13/374—Handling requests for interconnection or transfer for access to common bus or bus system with decentralised access control using a self-select method with individual priority code comparator
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4027—Coupling between buses using bus bridges
- G06F13/4031—Coupling between buses using bus bridges with arbitration
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
- G06F13/4291—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus using a clocked protocol
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40052—High-speed IEEE 1394 serial bus
- H04L12/40071—Packet processing; Packet format
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40052—High-speed IEEE 1394 serial bus
- H04L12/40091—Bus bridging
Definitions
- An inter-integrated circuit bus for example, referred to as an I2C bus for short, is known as a data bus for communication between various circuit parts, for example between a controller and a peripheral device.
- This bus system is designed as a master-slave bus system.
- German Patent Application No. DE 10 2012 222 357 A1 describes an I2C slave interface for which collisions between multiple devices at the bus are avoided when I2C slave components with different operating modes are operated.
- I3C bus A refinement of the I2C bus is the so-called improved inter-integrated circuit bus, referred to as I3C bus for short.
- the I3C bus is based on the I2C bus.
- I2C slaves may also be operated on an I3C bus that includes an I3C master.
- a mixed operation of I3C slaves and I2C slaves on an I3C bus that includes an I3C master is also possible.
- a connection of I3C slaves to an I2C bus that includes an I2C master is not provided.
- the present invention provides an improved inter-integrated circuit (I3C) slave interface, an integrated circuit, and a method for operating an I3C slave interface.
- I3C inter-integrated circuit
- An I3C slave interface for coupling an I3C slave to an I3C bus or an I2C bus.
- the I3C slave interface includes an adaptation device.
- the adaptation device is designed to connect the I3C slave to an I2C bus.
- An integrated circuit that includes an I3C slave interface according to the present invention.
- a method for operating an I3C slave interface includes a step for providing an adaptation device.
- the adaptation device is designed to connect an I3C slave to an I2C bus.
- the method includes a step for coupling the I3C slave to an I3C bus or an I2C bus, using the provided adaptation device.
- the underlying finding of the present invention is that, although the operation of I2C slaves on an I3C bus is possible, conversely, the operation of I3C slaves on an I2C bus that includes an I2C master has not been provided thus far.
- an additional adaptation device is provided in the I3C slave interface which allows a signal adaptation of the signals between the I2C bus and the I3C slave.
- Such an adaptation device for adapting the signals of an I2C bus for an I3C slave may be implemented, for example, analogously to a corresponding circuit configuration for coupling an I2C slave to an I2C bus.
- such an adaptation device may include, for example, driver stages, filter elements, or also delay elements, as used, for example, for coupling an I2C slave to an I2C bus.
- I3C slaves it is thus also possible to connect I3C slaves to an I2C bus.
- I2C bus it is thus possible to operate novel I3C slaves on a conventional I2C bus.
- modules that include an I3C interface it is thus possible, for example, for modules that include an I3C interface to be integrated as I3C slaves on existing, conventional infrastructures that are operated with an I2C bus, in particular including an I2C master.
- I3C bus systems for example due to their lower data rate and their greater tolerances in the signal patterns according to the specifications, may also be operated as bus systems having a greater spatial extent. Due to the expansion according to the present invention of an I3C slave for an I2C bus system, for such cases it is also possible to use I3C slaves on a corresponding bus system.
- the adaptation device is bridgeable and/or deactivatable for the connection of an I3C slave to an I2C bus.
- the adaptation device need be integrated into the signal pattern between the I3C slave and the connected bus only if necessary. This allows, for example, the operation of an I3C slave on I2C bus systems and also on I3C bus systems.
- the adaptation device includes a number of one or multiple delay elements, glitch filters, and/or driver elements.
- These types of circuit elements such as delay elements, glitch filters, or driver elements, are used in particular for connecting I2C slaves to an I2C bus.
- delay elements still allow reliable operation and data exchange, in particular with the possibly high tolerances during operation on an I2C bus, in particular with a great spatial extent or other interferences.
- Glitch filters may be used, for example, for debouncing the transmitted signals or for similar purposes.
- Driver elements, in particular driver elements for the connections to an I2C bus allow a sufficient signal amplification of the transmitted and/or received signals, in particular of the data signals and the clock signals on the I2C bus.
- any other circuit elements for adapting the signals between an I3C slave and an I2C bus are also possible.
- the I3C slave interface includes a control device.
- the control device may be designed to receive external signaling.
- This external signaling may represent, for example, signaling for the data bus to which the I3C slave interface is or is to be connected.
- the signaling may include, for example, a digital signal such as a digital voltage signal or the like.
- the signaling may be provided with the aid of a manual switch, for example.
- signalings from another connected device are also possible.
- the signaling may, for example, be provided once and subsequently stored in the signaling device. Such signaling thus corresponds, for example, to programming of the control device for future operation.
- the control device may also be designed to bridge and/or deactivate the adaptation device as a function of the received external signaling.
- the operation of the I3C slave interface may be flexibly adapted to a data bus to be connected, in particular to an I2C bus or an I3C bus.
- the I3C slave interface includes a detector device.
- the detector device is designed to detect a connected I3C bus or a connected I2C bus.
- the detector device may also be designed to bridge or deactivate the adaptation device if a connected I3C bus has been detected.
- the detection of the connected bus may take place with the aid of any suitable methods.
- the detector device may receive and analyze signals on a connected bus.
- the type of connected bus may be identified with the aid of a detected clock rate, transmitted data, or the like.
- any other methods for detecting the connected bus are also possible.
- the adaptation device may be subsequently activated or looped into the signal pattern in order to adapt the signals between the I3C module and the connected I2C bus. If an I3C bus has been detected, the adaptation device may be bridged or at least deactivated, so that the signals between the I3C module of the slave and the connected I3C bus are not further modified.
- FIG. 1 shows a schematic illustration of a block diagram of an I3C slave that includes a slave interface according to one specific embodiment of the present invention.
- FIG. 2 shows a schematic illustration of a block diagram of an I3C slave that includes a slave interface according to another specific embodiment of the present invention.
- FIG. 3 shows a schematic illustration of a flow chart which is the basis of a method for operating an I3C slave interface according to one specific embodiment of the present invention.
- FIG. 1 shows a schematic illustration of a block diagram of an I3C slave 1 according to one specific embodiment.
- I3C slave 1 may be connected to an I3C bus or I2C bus 20 .
- the data bus in particular the I2C bus, may include two signal lines 21 , 22 .
- One of the two signal lines 21 may be utilized, for example, as a clock line (serial clock line (SCL)), and the other line 22 may be used as a data line (serial data line (SDA)).
- SCL serial clock line
- SDA serial data line
- Lines 21 , 22 of I2C bus 20 may be coupled to an adaptation device 11 .
- Adaptation device 11 connects lines 21 , 22 of I2C bus 20 to an internal input/output device 15 of I3C slave 1 .
- Internal input/output device 15 is designed to receive and emit signals in an I3C-compliant format. If I3C slave 1 is connected to an I3C bus that includes an I3C master, the signals may thus be directly exchanged between internal input/output device 15 and I3C bus without further modification.
- adaptation device 11 may be bridged or deactivated, for example.
- adaptation device 11 carries out an adaptation of the signals between I2C bus 20 and internal input/output device 15 .
- the signal levels may be adapted with the aid of suitable driver elements (not illustrated) in adaptation device 11 . It is thus possible to adapt the voltage and/or the power provided at I2C bus 20 if necessary.
- debouncing of the signals from I2C bus 20 may take place, for example, with the aid of so-called glitch filters or other suitable circuit elements.
- the synchronization of the signal patterns may be adapted in this way.
- any other suitable circuit elements for adapting the signals between the internal signal patterns according to the I3C standard and the signal patterns on the external I2C bus are also possible.
- an I3C slave 1 it is thus possible, with the aid of adaptation device 11 , for an I3C slave 1 to also be connected to an external I2C bus 20 with the aid of additional adaptation device 11 .
- adaptation device 11 may also be bridged and/or deactivated if necessary. In this way, I3C slave 1 may also be connected to an I3C bus.
- a control device 12 may be provided that bridges or at least deactivates adaptation device 11 if necessary.
- external signaling for example, may be provided at control device 12 .
- Control device 12 may subsequently activate or deactivate adaptation device 11 or also completely bridge adaptation device 11 as a function of the external signaling.
- signaling may be understood to mean, for example, the application of a predefined voltage to control device 12 .
- a mechanical switching element may be switched back and forth between two switching states in order to provide appropriate signaling at control device 12 .
- appropriate signaling at control device 12 may also be provided by some other electronic switching element.
- control device 12 may store signaling that is provided once, and may subsequently permanently activate or deactivate or bridge adaptation device 11 .
- control device 12 may continuously query the external signaling and correspondingly activate or deactivate or bridge adaptation device 11 .
- FIG. 2 shows a schematic illustration of a block diagram of an I3C slave 1 according to a further specific embodiment.
- I3C slave 1 according to the specific embodiment in FIG. 2 largely corresponds to the specific embodiment described above, so that a repetition of the discussion in question has been omitted here.
- I3C slave 1 differs from the specific embodiment described above solely in that instead of control device 12 , a detector device 13 is provided which automatically detects a connected I2C bus 20 .
- detector device 13 may distinguish between a connected I3C bus and a connected I2C bus 20 . If an I2C bus has been detected, adaptation device 11 is activated or looped into the signal flow between internal input/output device 15 and I2C bus 20 . Alternatively, if an I3C bus has been detected, adaptation device 11 is deactivated or bridged.
- detector device 13 may analyze the signal patterns on at least one of lines 21 , 22 of the bus in order to deduce the particular connected I3C bus or I2C bus.
- any other methods for detecting the particular connected bus are also possible.
- FIG. 3 shows a schematic illustration of a flow chart which is the basis of a method for operating an I3C slave interface according to one specific embodiment.
- An adaptation device 11 is initially provided in step S 1 .
- This adaptation device 11 is designed to connect an I3C slave 1 to an I2C bus.
- I3C slave 1 is coupled to a bus via provided adaptation device 11 in step S 2 .
- I3C slave 1 may be connected either to an I3C bus or an I2C bus.
- adaptation device 11 may be bridged or deactivated if I3C slave 1 has been coupled to an I3C bus.
- adaptation device 11 may be activated or looped into the signal path if I3C slave 1 has been coupled to an I2C bus 20 .
- the present invention relates to an interface for an I3C slave.
- the interface according to the present invention allows I3C slaves to also be connected to a conventional I2C bus that includes an I2C master.
- an additional adaptation device is provided which adapts the signals of the I2C bus for an I3C slave.
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
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Abstract
Description
Claims (5)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018210061.6 | 2018-06-21 | ||
DE102018210061.6A DE102018210061A1 (en) | 2018-06-21 | 2018-06-21 | I3C slave interface, integrated circuit with an I3C slave interface and method for operating an I3C slave interface |
PCT/EP2019/059580 WO2019242906A1 (en) | 2018-06-21 | 2019-04-12 | I3c slave interface, integrated circuit having an i3c slave interface, and method for operating an i3c slave interface |
Publications (2)
Publication Number | Publication Date |
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US20210019279A1 US20210019279A1 (en) | 2021-01-21 |
US11436180B2 true US11436180B2 (en) | 2022-09-06 |
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US17/043,049 Active US11436180B2 (en) | 2018-06-21 | 2019-04-12 | I3C slave interface, integrated circuit including an I3C slave interface, and method for operating an I3C slave interface |
Country Status (4)
Country | Link |
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US (1) | US11436180B2 (en) |
CN (1) | CN112292673B (en) |
DE (1) | DE102018210061A1 (en) |
WO (1) | WO2019242906A1 (en) |
Families Citing this family (1)
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CN113220614B (en) * | 2021-04-30 | 2022-11-29 | 山东英信计算机技术有限公司 | Method, system and medium for self-adaptive management of I2C and I3C devices |
Citations (12)
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DE102013227048A1 (en) * | 2013-12-20 | 2015-06-25 | Robert Bosch Gmbh | Method for assigning device identifiers in a bus system, master device, slave device and bus system |
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2018
- 2018-06-21 DE DE102018210061.6A patent/DE102018210061A1/en active Pending
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2019
- 2019-04-12 CN CN201980042163.7A patent/CN112292673B/en active Active
- 2019-04-12 US US17/043,049 patent/US11436180B2/en active Active
- 2019-04-12 WO PCT/EP2019/059580 patent/WO2019242906A1/en active Application Filing
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DE102012222357A1 (en) | 2012-12-05 | 2014-06-05 | Robert Bosch Gmbh | Inter-Integrated Circuit Slave Interface and Method of Operating an Integrated Integrated Circuit Slave Interface |
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US20150234774A1 (en) * | 2014-02-20 | 2015-08-20 | Qualcomm Incorporated | Coexistence of legacy and next generation devices over a shared multi-mode bus |
US20160195910A1 (en) * | 2014-02-20 | 2016-07-07 | Qualcomm Incorporated | Farewell reset and restart method for coexistence of legacy and next generation devices over a shared multi-mode bus |
US20150370735A1 (en) * | 2014-06-18 | 2015-12-24 | Qualcomm Incorporated | Dynamically adjustable multi-line bus shared by multi-protocol devices |
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Also Published As
Publication number | Publication date |
---|---|
WO2019242906A1 (en) | 2019-12-26 |
CN112292673A (en) | 2021-01-29 |
CN112292673B (en) | 2024-08-20 |
DE102018210061A1 (en) | 2019-12-24 |
US20210019279A1 (en) | 2021-01-21 |
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